Electromagnetic Wave Prob. (Is this a typo/error??) http://img519.imageshack.us/img519/4536/errorko2.th.jpg [Broken] This is the book's solution to an E&M problem. I typed in the part that is enclosed by a red box. Am I not correct, and the "official" solution is wrong?!? It's basically a math error, but I can't believe they made it.